Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe29211b9cda3fc…

MALICIOUS

PDF

73.6 KB Created: 2021-09-03 04:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 30d654412965c5d4c1a8bc4e023c8756 SHA-1: 553305d30296f01ec7b3f39e62c04a7c7015e3fc SHA-256: ffe29211b9cda3fc61408c628a902204d6df6820f9ddef11937ee45113e16db8
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by an ML classifier and contains numerous external URIs, many pointing to compromised CMS upload storage. The document functions as a link farm, likely intended to manipulate search engine results or redirect users to malicious content hosted on these sites. The presence of multiple links on disposable hosting and the use of UTM parameters further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130354fbcf1d---18925458925.pdf In PDF document text
    • http://dichvutot99.com/webroot/img/files/5295095320.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/47815985231.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/89b250eb6a7275f68a59d3bc0e7dc600/29294266490.pdfIn PDF document text
    • http://www.bash.cl/media/file/bovirovana.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c54809701---53843898355.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/0ecc1469bac550434852b9c1cfeb0e32/vomugote.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/97351609414.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/19ba3f9a01280c6002b0a45741332d64/wepugideti.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/xobodudirew.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160aac81fb4b3d---xigisexeve.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/70128297500.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/62436529796.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/23323248601.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88a5329ddb---zigukexarut.pdfIn PDF document text
    • https://hostessima.pl/userfiles/file/32593720794.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/5fvclvor0s492n1cqrkrignkp5/xixun.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/41615550034.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/8ad4a7d2b8b06b53d197153343f5f523/17488464904.pdfIn PDF document text
    • https://vvpta-irvine.org/userfiles/file/nefuxidexipesuwug.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16089e300753e0---kamodumisukujosabatimun.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/76992983184.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a24522ef85---29670024805.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=audi+a3+sportback+2010+owners+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA95 11540 bytes
SHA-256: d41004460f51d9a306ad842651fc68293459c9439ecf29d851d5eb16f211dc8d
font_01_sfnt_off0000d5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E8 16648 bytes
SHA-256: dc46f76452fed25dc76c913337dc86b0b5a3d42b31ea28362f164f353cbd0f4f
font_02_sfnt_off000100c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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